Khan Academy: Mean (Expected Value) of a Discrete Random Variable

Discover how to calculate the expected value of a random variable. In the seventh installment of a 21-part module, young mathematicians develop the formula for expected value. They connect this concept the dot product of vectors.

You don't need to be discreet about using the resource on discrete variables. In the fifth installment of a 21-part module, scholars explore random variables and learn to distinguish between discrete and continuous random variables. They...

Learn how to analyze probability distributions. The sixth installment of a 21-part module teaches pupils to use probability distributions to determine the long-run behavior of a discrete random variable. They create graphs of probability...

Finding the mean (or expected value) of a discrete random variable.

A practice word problem asking students to calculate the mean of B in a probability chart.

A PowerPoint explaining and showing examples of how to measure the mean of the values of a random variable.

[Free Registration/Login may be required to access all resource tools.] This Concept teaches students how to find the mean and standard deviation for discrete random variables.

Video explains the relationship between expected value and population mean and provides an example of calculating expected value using frequencies. [14:53]

Wanna roll the dice? Determine whether it is a good idea to play a dice game. An interactive presents the rules for a game of dice. Pupils find the probabilities of each event and calculate the expected value of the game. They finish...

Example of transforming a discrete random variable.